EP0778028B1 - Compositions for the prevention and treatment of urogenital disorders, containing bismuth and one or more antimicrobials - Google Patents

Compositions for the prevention and treatment of urogenital disorders, containing bismuth and one or more antimicrobials Download PDF

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Publication number
EP0778028B1
EP0778028B1 EP96308851A EP96308851A EP0778028B1 EP 0778028 B1 EP0778028 B1 EP 0778028B1 EP 96308851 A EP96308851 A EP 96308851A EP 96308851 A EP96308851 A EP 96308851A EP 0778028 B1 EP0778028 B1 EP 0778028B1
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bismuth
milligrams
antimicrobials
days
administered
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German (de)
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EP0778028A1 (en
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Jamesina Anne Fitzgerald
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Procter and Gamble Co
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Procter and Gamble Co
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    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K33/00Medicinal preparations containing inorganic active ingredients
    • A61K33/24Heavy metals; Compounds thereof
    • A61K33/245Bismuth; Compounds thereof
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61KPREPARATIONS FOR MEDICAL, DENTAL OR TOILETRY PURPOSES
    • A61K31/00Medicinal preparations containing organic active ingredients
    • A61K31/60Salicylic acid; Derivatives thereof
    • AHUMAN NECESSITIES
    • A61MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61PSPECIFIC THERAPEUTIC ACTIVITY OF CHEMICAL COMPOUNDS OR MEDICINAL PREPARATIONS
    • A61P33/00Antiparasitic agents
    • A61P33/02Antiprotozoals, e.g. for leishmaniasis, trichomoniasis, toxoplasmosis

Definitions

  • an object of the present invention is to provide safe and effective compositions for preventing and/or treating urogenital disorders caused or mediated by parasitic protozoa.
  • a further object of the invention is the use of of bismuth and one or more antimicrobials for the manufacture of a medicament for the treatment of a urogenital disorder caused a mediated by parasitic protozoa.
  • the present invention relates to the use of bismuth for the manufacture of a medicament for the treatment of a human or lower animal subject having a urogenital disorder caused or mediated by one or more parasitic protozoa comprising administering to the subject from about 50 milligrams to about 5000 milligrams of bismuth, per day, for from about 1 to 56 days; and from about 100 milligrams to about 10,000 milligrams of each of one or more antimicrobials, per day, for from about 1 to about 21 days.
  • the present invention also relates to the use of bismuth for the manufacture of a medicament for the prevention in a human or lower animal of a urogenital disorder caused or mediated by one or more parasitic protozoa comprising administering to the subject from about 50 milligrams to about 5000 milligrams of bismuth, per day, for from about 1 to 21 days; and from about 100 milligrams to about 10,000 milligrams of each of one or more antimicrobials, per day, for from about 1 to about 14 days.
  • the components of the present invention are more fully defined below.
  • urogenital disorder encompasses any infection, disease or other disorder of the urinary and/or reproductive systems, caused or mediated by one or more parasitic protozoa.
  • disorders include one or more of the following conditions: vaginitis; vaginal burning, itching, discharge; ulcerative lesions; dysuria; painful urination; prostatitis; urethritis; epidiymitis; urethral stricture; and any other urogenital condition commonly associated with infection by parasitic protozoa.
  • urogenital disorder also includes any condition commonly associated with protozoa infection in immunocompromised subjects including but not limited to foul smelling discharge, bleeding or purulent urogenital lesions, severe pruritus, painful dysuria, and microhematuria.
  • Protozoa are unicellular, eucaryotic organisms which contain a nucleus, or nuclei, and cytoplasm.
  • Preferred parasitic protozoa are Trichomonas vaginalis , Encephalitozoon hellem , and combinations thereof. Most preferred parasitic protozoa is Trichomonas vaginalis .
  • the organisms are fully described in Manual of Clinical Microbiology , Sixth Edition, 1204-1205, 1213-1217, and 1225-1228 (1995).
  • Diagnosis of urogenital disorders caused or mediated by parasitic protozoa may be accomplished by any method commonly used in the medical community. Such methods are fully described in Manual of Clinical Microbiology , as referenced above.
  • bismuth for the manufacture of a medicament for the treatment and/or prevention in the present invention involve administration of bismuth.
  • the quantity of bismuth is by weight of elemental bismuth.
  • bismuth may be administered in an amount of from about 50 milligrams to about 5000 milligrams, and preferably from about 50 milligrams to about 2500 milligrams, per day, for from about 1 to about 56 days, preferably for from about 2 to about 28 days, and most preferably for from about 7 to about 21 days.
  • bismuth in a medicament for prevention, bismuth may be administered in an amount of from about 50 milligrams to about 5000 milligrams, and preferably from about 50 milligrams to about 2500 milligrams, per day, for from about 1 to about 21 days, and preferably for from about 1 to about 14 days.
  • bismuth may be administered prior to potential exposure to parasitic protozoa.
  • Such administration of bismuth may vary depending on the likelihood of parasitic protozoa exposure and condition of the subject and may be commenced at any time deemed beneficial by the medical community including from about 1 to about 7 days, from about 2 to about 5 days, and from about 3 to about 4 days, prior to potential exposure.
  • bismuth includes bismuth in the form of a pharmaceutically-acceptable salt, bismuth or bismuth salt in the form of an organic complex which contains bismuth as an active ingredient, and mixtures thereof.
  • organic complexes include 2,2'-spirobi[1,,32-benzodoxabismole].
  • bismuth is administered in the present methods as a pharmaceutically-acceptable salt.
  • Such bismuth salts include bismuth aluminate, bismuth subcarbonate, bismuth subcitrate, bismuth citrate, tripotassium dicitrato bismuthate, bismuth subgallate, bismuth subnitrate, bismuth tartrate, bismuth subsalicylate, and mixtures thereof.
  • Bismuth citrate, bismuth subcitrate, tripotassium dicitrato bismuthate, bismuth tartrate, bismuth subsalicylate, and mixtures thereof are preferred bismuth salts for use in this invention.
  • the bismuth useful herein may be administered alone, or in combination with other pharmaceutically-acceptable components in a bismuth-containing composition.
  • compositions containing bismuth salts are commercially available.
  • Such compositions include DeNol, containing tripotassium dicitrato bismuthate (by Brocades); Bislumina, containing bismuth aluminate (by Mazuelos); Roter, containing bismuth subnitrate (by Roterpharma); Devrom®, containing bismuth subgallate (by The Parthenon Co., Inc.); and Pepto-Bismol®, containing bismuth subsalicylate (by The Procter & Gamble Company).
  • Bismuth may be administered in the form of a douche, douche powder, suppository, tablet, ointment, cream, gel, mousse, foam or any other form which would administer bismuth intravaginally to the subject.
  • the delivery systems are described in detail in Remington's Pharmaceutical Sciences , 18th Edition, 1609-1614, 1632, 1525;1519-1544, 1597-1614, 1633-1675, (1990); and Ansel, et al., Pharmaceutical Dosage Forms and Drug Delivery Systems , Fifth Edition, 373-389 (1990).
  • the present invention also include administration of a safe and effective amount of one or more antimicrobials, per day.
  • antimicrobial(s) refers to one or more antimicrobials.
  • each of the one or more antimicrobials is administered at a level of from about 100 milligrams to about 10,000 milligrams, per day, for from about 1 to about 28 days.
  • each of the one or more antimicrobials is administered at a level of from about 100 milligrams to about 8000 milligrams per day, and more preferably at from about 100 milligrams to about 5000 milligrams per day.
  • each of the antimicrobials is administered for from about 1 to about 7 to 10 days, more preferably for from about 1 to about 14 days, and most preferably for from about 1 to about 21 days.
  • each of the one or more antimicrobials is administered for from about 1 to about 14 days, and preferably for from about 1 to about 7 to 10 days.
  • the specific dosage of antimicrobial(s) to be administered, as well as the duration of antimicrobial(s) treatment, are mutually dependent, and will also depend upon such factors as the specific antimicrobial used, the number of antimicrobials used in the treatment, the resistance pattern of the infecting organism to the antimicrobial used, the ability of the antimicrobial to reach minimum inhibitory concentrations at the site of the infection, the nature and extent of other infections (if any), the personal attributes of the subject, compliance with the treatment regimen, and the presence and severity of any side effects of the treatment. Therefore, in the case of prevention or treatment with more than one antimicrobial, the duration of administration should depend on the type of antimicrobial rather than the administration of the antimicrobials for the same number of days.
  • antimicrobial refers to any naturally-occurring, synthetic or semi-synthetic compound or composition or mixture thereof, which is safe for human use as used in the methods of this invention, and is effective in killing or substantially inhibiting the parasitic protozoa when used in the uses of this invention.
  • Antiprotozoal agents, antiparasitic agents and antibiotics are among the preferred antimicrobials useful herein.
  • Antiprotozoal and antiparasitic agents suitable for use in the present invention include any of the agents recognized in the medical community as acceptable for treating protozoal infection.
  • Such antiprotozoal and antiparasitic agents include atovaquone, chloroquine phosphate, quinacrine hydrochloride, iodoquinol, pyrimethamine, and mefloquine hydrochloride.
  • Antibiotics can be generally classified by chemical composition into the following principal groups: the aminoglycosides, such as gentamicin, neomycin, kanamycin, and streptomycin; the macrolides, such as erythromycin, clindamycin, and rifampin; the penicillins, such as penicillin G, penicillin V, ampicillin and amoxycillin; the polypeptides such as bacitracin and polymyxin; the tetracyclines such as tetracycline, chlortetracycline, oxytetracycline and doxycycline; the cephalosporins such as cephalexin and cephalothin; quinolones such as ciprofloxacin, norfloxacin and ofloxacin; and such miscellaneous antibiotics as trimethoprim, sulfamethoxazole and the combination thereof, and chloramphenicol. These antibiotics can generally be said to function in one of four ways: inhibition of cell
  • antimicrobials useful herein include the sulfonamides; nitrofurans, such nitrofurazon, nitrofurantoin, and furozolidone; metronidazole, tinidazole, and nimorazole. Antimicrobials among those useful herein are described in Remington's Pharmaceutical Sciences, 18th Edition, pp. 1173-1232 (1990).
  • antimicrobials penicillin, tetracycline, metronidazole, doxycycline, tinidazole, amoxycillin, ampicillin, nitrofurantoin, and atovaquone are among the preferred antimicrobials for use in the present invention.
  • the specific preferred quantity of antimicrobial and duration of treatment used in the methods of this invention will, in addition to other factors, depend upon the particular antimicrobial used and its pharmacology.
  • the tetracyclines are preferably administered at a level of from about 100 milligrams to about 2,000 milligrams per day.
  • Macrolides such as erythromycin
  • Penicillins are preferably administered at a level of from about 500 milligrams to about 3,000 milligrams per day.
  • the aminoglycosides are preferably administered at a level of from about 100 milligrams to about 8,000 milligrams per day.
  • Nitrofurans (such as nitrofurantoin) are administered preferably at levels of from about 100 milligrams to about 800 milligrams per day.
  • metronidazole is administered at a level of from about 500 to about 2,000 milligrams per day.
  • atovaquone is administered at a level of from about 750 to about 2250 milligrams, per day.
  • the specific method of administering the antimicrobial may depend upon such factors as the particular antimicrobial(s) used, the site of infection, the amount of antimicrobial(s) to be administered per day, the presence of any adverse side effects, and the interactions (if any) between the antimicrobial(s) and the bismuth.
  • the antimicrobial(s) may be administered under the process of this invention by single daily doses, or by administration in two, three, four, or more doses per day.
  • compositions according to the described use comprise a safe and effective amount of bismuth and a safe and effective amount of one or more antimicrobials.
  • these compositions comprise a safe and effective amount one or more antimicrobials; a safe and effective amount of bismuth; and pharmaceutically-acceptable carrier materials; wherein the safe and effective amount of the one or more antimicrobials and the bismuth is effective for preventing and/or treating a urogenital disorder caused or mediated by one or more parasitic protozoa.
  • a preferred composition comprises:
  • compositions of the present invention may contain optional components which affect the physical and therapeutic characteristics of the present compositions.
  • a variety of pharmaceutically-acceptable carriers and excipients may be included, depending upon the particular intravaginal dosage form to be used.
  • Suppositories, and tablets can be compressed, coated or multiple compressed, containing suitable binders, lubricants, diluents, disintegrating agents, coloring agents, flow-inducing agents and melting agents.
  • Liquid intravaginal dosage forms include aqueous solutions, emulsions, suspensions, solutions, and/or suspensions reconstituted from granules or powders containing suitable solvents, preservatives, emulsifying agents, suspending agents, diluents, melting agents, and coloring agents.
  • compositions of this invention may be used according to the methods of this invention by administering the composition from 1 to 7 times per day, and preferably from 1 to 4 times per day; for from 1 to 21 days, preferably for from about 1 to about 14 days.
  • the specific frequency of administration will depend upon such factors as the specific bismuth compound or composition and antimicrobial(s) used, the levels at which the components are incorporated in the composition, the nature and severity of the condition to be treated, and the nature of any concurrent therapy, if any.
  • the present invention comprises uses wherein the administration of bismuth and the administration of one or more antimicrobials are performed simultaneously (beginning and ending on the same day), concurrently (overlapping), or consecutively (sequential, but wherein the course of the treatment is substantially continuous).
  • the step of administering the antimicrobial(s) is not commenced prior to commencing the step of administering bismuth.
  • administering refers to any method which, in sound medical practice delivers the compounds or compositions used in this invention to the subject to be treated in such a manner so as to be effective in the treatment of the urogenital disorder.
  • the bismuth is administered intravaginally in the form of a douche.
  • the antimicrobial(s) is administered either orally, intravenously, intravaginally or any other method which effects systemic distribution, or local distribution to the site of the urogenital disorder, of the antimicrobial(s) in the subject.
  • Oral ingestion of the antimicrobial(s) is a preferred method of administering the antimicrobial(s) in the methods of this invention.
  • a young, college coed visits a campus health center for her routine annual gynecological exam, complaining of vaginal irritation.
  • the physician observes the presence of a foamy, yellowish-green discharge and chafing of the vagina, vulva, and perineum.
  • a vaginal speculum exudate is collected from the vaginal canal and a wet mount preparation is made promptly and analyzed microscopically.
  • the presence of organisms, 5-20 m in length with a jerky-type motion confirms the presence of Trichomonas vaginalis .
  • the patient is treated by a method of the present invention.
  • a composition containing bismuth subsalicylate is administered in a liquid douche delivering approximately 2500 mg of bismuth per liter of douching solution, twice daily (a total of 5000 milligrams of bismuth daily) for twenty-one days.
  • Atovaquone tablets 750 milligrams per tablet
  • vaginal samples from the patient are analyzed again, finding no trace of parasitic infection.
  • the subject remains asymptomatic, and another vaginal analysis performed 5 months later is normal.
  • tripotassium dicitrato bismuthate, bismuth tartrate, bismuth citrate, and bismuth subgallate, bismuth subnitrate may be substituted, respectively, for bismuth subsalicylate, with substantially similar results.
  • penicillin erythromycin, metronidazole, doxycycline, tinidazole, amoxicillin, ampicillin, nitrofurantoin, chloroquine phosphate, quinacrine hydrochloride, iodoquinol, pyrimethamine, and mefloquine hydrochloride may be substituted for atovaquone with substantially similar results.
  • a male AIDS patient who recently recovered from cryptosporidal diarrhea, reports symptoms of genital irritation to his primary healthcare provider. Upon examination of the patient's penis, a small, purulent lesion is observed one centimeter from the urethral opening. A thin smear of the exudate is prepared and stained for 90 minutes with Modified Trichome-Blue Stain before oil immersion examination, while a midstream urine sample is collected, centrifuged, and examined promptly via light microscopy. The results show no indication of urinary infection; however, the presence of spores with coiled polar tubules confirms an infection with Encephalitozoon hellem .
  • the infection is treated by cleansing the lesion gently with non-medicated soap and topically applying a small amount of an ointment consisting of 10% bismuth subcitrate, 0.75% metronidazole, and 0.1% iodoquinol twice daily over the lesion for about 28 days, until the lesion has healed completely. Thereafter, visual inspection of the penis is performed, finding slight scarring but no trace of parasitic infection.
  • bismuth citrate, bismuth tartrate, bismuth aluminate, bismuth subgallate, and bismuth subsalicylate are substituted, respectively, for bismuth subcitrate, with substantially similar results.
  • penicillin, erythromycin, doxycycline, tinidazole, amoxicillin, ampicillin, nitrofurantoin, and atovaquone are substituted, respectively, for metronidazole or iodoquinol, with substantially similar results.
  • either antibiotic can be eliminated from the regimen (e.g. due to hypersensitivity) and maintain therapeutic efficacy.
  • a young man in the presence of his physician, confides to his future bride two days before their marriage that he is being treated for a urethral infection caused by Trichomonas vaginalis , reportedly from using a contaminated towel at his gym.
  • the physician advises the groom to continue his current therapy until eradication of the parasite is complete.
  • Clinical analyses indicate that the bride currently is not infected. Since the use of condoms is not considered due to religious beliefs, the bride is given 3500 milligrams of bismuth, administered as bismuth subnitrite in a vaginal suppository, for use thirty minutes before sexual intercourse. Following intercourse, a douche is administered delivering 500 milligrams of furolzolidone in one liter of douching solution. The suppository and douching regimen are used for about 30 days or until her husband is determined to be free of infection. At this time, vaginal samples are taken from the wife and analyzed and no evidence of parasitic infection is found.

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Abstract

The subject invention encompasses methods for prevention and treatment of a human or lower animal subject having a urogenital disorder caused or mediated by one or more parasitic protozoa comprising administering to the subject bismuth and one or more antimicrobials. The subject invention also encompasses compositions comprising bismuth and one or more antimicrobials for the prevention and treatment of a human or lower animal subject having a urogenital disorder caused or mediated by one or more parasitic protozoa.

Description

BACKGROUND OF THE INVENTION
While many industrialized countries have come to regard parasitic infection as a problem of impoverished developing countries, this is far from the truth. The incidence of parasitic infection, especially of the urogenital tract, continues to present a serious health concern. For example, in the United States in some areas, the incidence of urogenital infection due to Trichomonas vaginalis is reported to be as high as fifty percent with twenty to fifty percent of infected women and ninety percent of infected men being asymptomatic. Zinsser Microbiology, 20th Edition, 1173, (1992). Additionally, in the case of urogenital infection, incidences are notoriously underestimated due to physicians prescribing broad spectrum antibiotics rather than isolating the offending, fastidious pathogen and the failure of physicians to report sexually transmitted vaginal diseases. Traditional treatment regimens for such infections consist of administration of a selective action antibiotic. However, antimicrobial resistance to such drugs is causing increasing concern about the ability to effectively treat parasitic infections in the future. Therefore, the need for effective antiparasitic treatment therapies continues to grow.
It has been discovered by the present invention that the administration of bismuth salts and one or more antimicrobials may be effective for the prevention and/or treatment of urogenital disorders caused or mediated by parasitic protozoa. Thus, an object of the present invention is to provide safe and effective compositions for preventing and/or treating urogenital disorders caused or mediated by parasitic protozoa. A further object of the invention is the use of of bismuth and one or more antimicrobials for the manufacture of a medicament for the treatment of a urogenital disorder caused a mediated by parasitic protozoa.
These and other objects of the present invention will become readily apparent from the detailed description which follows.
SUMMARY OF THE INVENTION
The present invention relates to the use of bismuth for the manufacture of a medicament for the treatment of a human or lower animal subject having a urogenital disorder caused or mediated by one or more parasitic protozoa comprising administering to the subject from about 50 milligrams to about 5000 milligrams of bismuth, per day, for from about 1 to 56 days; and from about 100 milligrams to about 10,000 milligrams of each of one or more antimicrobials, per day, for from about 1 to about 21 days.
The present invention also relates to the use of bismuth for the manufacture of a medicament for the prevention in a human or lower animal of a urogenital disorder caused or mediated by one or more parasitic protozoa comprising administering to the subject from about 50 milligrams to about 5000 milligrams of bismuth, per day, for from about 1 to 21 days; and from about 100 milligrams to about 10,000 milligrams of each of one or more antimicrobials, per day, for from about 1 to about 14 days.
DETAILED DESCRIPTION OF THE INVENTION
The use of bismuth for the manufacture of a medicament of the present invention comprise the prevention and/or treatment of urogenital disorders caused or mediated by one or more parasitic protozoa. Such urogenital disorders are prevented and/or treated by the administration of bismuth and one or more antimicrobials. The components of the present invention are more fully defined below.
Urogenital Disorder
The term "urogenital disorder", as used herein, encompasses any infection, disease or other disorder of the urinary and/or reproductive systems, caused or mediated by one or more parasitic protozoa. Such disorders include one or more of the following conditions: vaginitis; vaginal burning, itching, discharge; ulcerative lesions; dysuria; painful urination; prostatitis; urethritis; epidiymitis; urethral stricture; and any other urogenital condition commonly associated with infection by parasitic protozoa.
In immunocompromised subjects, urogenital disorders caused or mediated by parasitic protozoa may be more severe and life threatening than the common disorders listed above. Therefore, the term "urogenital disorder" also includes any condition commonly associated with protozoa infection in immunocompromised subjects including but not limited to foul smelling discharge, bleeding or purulent urogenital lesions, severe pruritus, painful dysuria, and microhematuria.
Parasitic Protozoa
Protozoa are unicellular, eucaryotic organisms which contain a nucleus, or nuclei, and cytoplasm. The term "parasitic protozoa", as used herein, refers to Protozoa such as Trichomonas vaginalis, and the microsporidia of the genera Pleistophora, Nosema, and Encephalitozoon. Preferred parasitic protozoa are Trichomonas vaginalis, Encephalitozoon hellem, and combinations thereof. Most preferred parasitic protozoa is Trichomonas vaginalis. The organisms are fully described in Manual of Clinical Microbiology, Sixth Edition, 1204-1205, 1213-1217, and 1225-1228 (1995).
Diagnosis of urogenital disorders caused or mediated by parasitic protozoa may be accomplished by any method commonly used in the medical community. Such methods are fully described in Manual of Clinical Microbiology, as referenced above.
Bismuth
The uses of bismuth for the manufacture of a medicament for the treatment and/or prevention in the present invention involve administration of bismuth. As used herein, the quantity of bismuth is by weight of elemental bismuth.
The preferred duration of bismuth administration will vary according to the specific urogenital disorder to be treated and the physical condition of the subject being treated. In general, as a method of treatment, bismuth may be administered in an amount of from about 50 milligrams to about 5000 milligrams, and preferably from about 50 milligrams to about 2500 milligrams, per day, for from about 1 to about 56 days, preferably for from about 2 to about 28 days, and most preferably for from about 7 to about 21 days.
In general, in a medicament for prevention, bismuth may be administered in an amount of from about 50 milligrams to about 5000 milligrams, and preferably from about 50 milligrams to about 2500 milligrams, per day, for from about 1 to about 21 days, and preferably for from about 1 to about 14 days. In a medicament for prevention, bismuth may be administered prior to potential exposure to parasitic protozoa. Such administration of bismuth may vary depending on the likelihood of parasitic protozoa exposure and condition of the subject and may be commenced at any time deemed beneficial by the medical community including from about 1 to about 7 days, from about 2 to about 5 days, and from about 3 to about 4 days, prior to potential exposure.
In the present uses, the term "bismuth", as used herein, includes bismuth in the form of a pharmaceutically-acceptable salt, bismuth or bismuth salt in the form of an organic complex which contains bismuth as an active ingredient, and mixtures thereof. Such organic complexes include 2,2'-spirobi[1,,32-benzodoxabismole]. Preferably, bismuth is administered in the present methods as a pharmaceutically-acceptable salt. Such bismuth salts include bismuth aluminate, bismuth subcarbonate, bismuth subcitrate, bismuth citrate, tripotassium dicitrato bismuthate, bismuth subgallate, bismuth subnitrate, bismuth tartrate, bismuth subsalicylate, and mixtures thereof. Bismuth citrate, bismuth subcitrate, tripotassium dicitrato bismuthate, bismuth tartrate, bismuth subsalicylate, and mixtures thereof are preferred bismuth salts for use in this invention.
The bismuth useful herein may be administered alone, or in combination with other pharmaceutically-acceptable components in a bismuth-containing composition. A variety of such compositions containing bismuth salts are commercially available. Such compositions include DeNol, containing tripotassium dicitrato bismuthate (by Brocades); Bislumina, containing bismuth aluminate (by Mazuelos); Roter, containing bismuth subnitrate (by Roterpharma); Devrom®, containing bismuth subgallate (by The Parthenon Co., Inc.); and Pepto-Bismol®, containing bismuth subsalicylate (by The Procter & Gamble Company).
Bismuth may be administered in the form of a douche, douche powder, suppository, tablet, ointment, cream, gel, mousse, foam or any other form which would administer bismuth intravaginally to the subject. The delivery systems are described in detail in Remington's Pharmaceutical Sciences, 18th Edition, 1609-1614, 1632, 1525;1519-1544, 1597-1614, 1633-1675, (1990); and Ansel, et al., Pharmaceutical Dosage Forms and Drug Delivery Systems, Fifth Edition, 373-389 (1990).
Antimicrobial
The present invention also include administration of a safe and effective amount of one or more antimicrobials, per day. As used herein, the term "antimicrobial(s)" refers to one or more antimicrobials.
Typically, according to the present use of bismuth for the manufacture of a medicament for prevention and treatment, each of the one or more antimicrobials is administered at a level of from about 100 milligrams to about 10,000 milligrams, per day, for from about 1 to about 28 days. Preferably, each of the one or more antimicrobials is administered at a level of from about 100 milligrams to about 8000 milligrams per day, and more preferably at from about 100 milligrams to about 5000 milligrams per day. It is also preferred that each of the antimicrobials is administered for from about 1 to about 7 to 10 days, more preferably for from about 1 to about 14 days, and most preferably for from about 1 to about 21 days. In the methods for prevention, it is further preferred that each of the one or more antimicrobials is administered for from about 1 to about 14 days, and preferably for from about 1 to about 7 to 10 days.
The specific dosage of antimicrobial(s) to be administered, as well as the duration of antimicrobial(s) treatment, are mutually dependent, and will also depend upon such factors as the specific antimicrobial used, the number of antimicrobials used in the treatment, the resistance pattern of the infecting organism to the antimicrobial used, the ability of the antimicrobial to reach minimum inhibitory concentrations at the site of the infection, the nature and extent of other infections (if any), the personal attributes of the subject, compliance with the treatment regimen, and the presence and severity of any side effects of the treatment. Therefore, in the case of prevention or treatment with more than one antimicrobial, the duration of administration should depend on the type of antimicrobial rather than the administration of the antimicrobials for the same number of days.
A wide variety of antimicrobials are useful in this invention. As used herein, the term "antimicrobial" refers to any naturally-occurring, synthetic or semi-synthetic compound or composition or mixture thereof, which is safe for human use as used in the methods of this invention, and is effective in killing or substantially inhibiting the parasitic protozoa when used in the uses of this invention. Antiprotozoal agents, antiparasitic agents and antibiotics are among the preferred antimicrobials useful herein.
Antiprotozoal and antiparasitic agents suitable for use in the present invention include any of the agents recognized in the medical community as acceptable for treating protozoal infection. Such antiprotozoal and antiparasitic agents include atovaquone, chloroquine phosphate, quinacrine hydrochloride, iodoquinol, pyrimethamine, and mefloquine hydrochloride.
Antibiotics can be generally classified by chemical composition into the following principal groups: the aminoglycosides, such as gentamicin, neomycin, kanamycin, and streptomycin; the macrolides, such as erythromycin, clindamycin, and rifampin; the penicillins, such as penicillin G, penicillin V, ampicillin and amoxycillin; the polypeptides such as bacitracin and polymyxin; the tetracyclines such as tetracycline, chlortetracycline, oxytetracycline and doxycycline; the cephalosporins such as cephalexin and cephalothin; quinolones such as ciprofloxacin, norfloxacin and ofloxacin; and such miscellaneous antibiotics as trimethoprim, sulfamethoxazole and the combination thereof, and chloramphenicol. These antibiotics can generally be said to function in one of four ways: inhibition of cell wall synthesis, alteration of cell wall permeability, inhibition of protein synthesis or inhibition of nucleic acid synthesis.
Other antimicrobials useful herein include the sulfonamides; nitrofurans, such nitrofurazon, nitrofurantoin, and furozolidone; metronidazole, tinidazole, and nimorazole. Antimicrobials among those useful herein are described in Remington's Pharmaceutical Sciences, 18th Edition, pp. 1173-1232 (1990).
While any of these antimicrobials may be used, penicillin, tetracycline, metronidazole, doxycycline, tinidazole, amoxycillin, ampicillin, nitrofurantoin, and atovaquone are among the preferred antimicrobials for use in the present invention.
As stated above, the specific preferred quantity of antimicrobial and duration of treatment used in the methods of this invention will, in addition to other factors, depend upon the particular antimicrobial used and its pharmacology. In general, though, the tetracyclines are preferably administered at a level of from about 100 milligrams to about 2,000 milligrams per day. Macrolides (such as erythromycin) are preferably administered at a level of from about 1,000 milligrams to about 4,000 milligrams per day. Penicillins are preferably administered at a level of from about 500 milligrams to about 3,000 milligrams per day. The aminoglycosides (such as neomycin) are preferably administered at a level of from about 100 milligrams to about 8,000 milligrams per day. Nitrofurans (such as nitrofurantoin) are administered preferably at levels of from about 100 milligrams to about 800 milligrams per day. Preferably, metronidazole is administered at a level of from about 500 to about 2,000 milligrams per day. Preferably, atovaquone is administered at a level of from about 750 to about 2250 milligrams, per day.
The specific method of administering the antimicrobial, according to the processes of this invention, may depend upon such factors as the particular antimicrobial(s) used, the site of infection, the amount of antimicrobial(s) to be administered per day, the presence of any adverse side effects, and the interactions (if any) between the antimicrobial(s) and the bismuth. Thus, the antimicrobial(s) may be administered under the process of this invention by single daily doses, or by administration in two, three, four, or more doses per day.
Bismuth/Antimicrobial Compositions:
Compositions according to the described use comprise a safe and effective amount of bismuth and a safe and effective amount of one or more antimicrobials. Typically, these compositions comprise a safe and effective amount one or more antimicrobials; a safe and effective amount of bismuth; and pharmaceutically-acceptable carrier materials; wherein the safe and effective amount of the one or more antimicrobials and the bismuth is effective for preventing and/or treating a urogenital disorder caused or mediated by one or more parasitic protozoa.
A preferred composition comprises:
  • (a) from about 50 milligrams to about 5,000 milligrams of bismuth; and
  • (b) from about 100 milligrams to about 10,000 milligrams of each of one or more antimicrobials.
  • Preferably, the bismuth salt is present at a level of from about 50 milligrams to about 2500 milligrams. Also, preferably each of the one or more antimicrobials is present at a level of from about 100 milligrams to about 8000 milligrams.
    The compositions of the present invention may contain optional components which affect the physical and therapeutic characteristics of the present compositions. In particular, a variety of pharmaceutically-acceptable carriers and excipients may be included, depending upon the particular intravaginal dosage form to be used. Suppositories, and tablets can be compressed, coated or multiple compressed, containing suitable binders, lubricants, diluents, disintegrating agents, coloring agents, flow-inducing agents and melting agents. Liquid intravaginal dosage forms include aqueous solutions, emulsions, suspensions, solutions, and/or suspensions reconstituted from granules or powders containing suitable solvents, preservatives, emulsifying agents, suspending agents, diluents, melting agents, and coloring agents.
    Techniques and compositions for making intravaginal dosage forms useful herein are more fully described in the following references, all incorporated by reference herein: Remington's Pharmaceutical Sciences, 18th Edition, 1609-1614, 1632, 1525;1519-1544, 1597-1614, 1633-1675, (1990); and Ansel, et al., Pharmaceutical Dosage Forms and Drug Delivery Systems, Fifth Edition, 373-389 (1990).
    The compositions of this invention may be used according to the methods of this invention by administering the composition from 1 to 7 times per day, and preferably from 1 to 4 times per day; for from 1 to 21 days, preferably for from about 1 to about 14 days. The specific frequency of administration will depend upon such factors as the specific bismuth compound or composition and antimicrobial(s) used, the levels at which the components are incorporated in the composition, the nature and severity of the condition to be treated, and the nature of any concurrent therapy, if any.
    Administration
    The present invention comprises uses wherein the administration of bismuth and the administration of one or more antimicrobials are performed simultaneously (beginning and ending on the same day), concurrently (overlapping), or consecutively (sequential, but wherein the course of the treatment is substantially continuous). Preferably, the step of administering the antimicrobial(s) is not commenced prior to commencing the step of administering bismuth.
    As used herein, the term "administering" refers to any method which, in sound medical practice delivers the compounds or compositions used in this invention to the subject to be treated in such a manner so as to be effective in the treatment of the urogenital disorder. Preferably, the bismuth is administered intravaginally in the form of a douche. The antimicrobial(s) is administered either orally, intravenously, intravaginally or any other method which effects systemic distribution, or local distribution to the site of the urogenital disorder, of the antimicrobial(s) in the subject. Oral ingestion of the antimicrobial(s) is a preferred method of administering the antimicrobial(s) in the methods of this invention.
    The following non-limiting examples illustrate the methods and uses of the present invention.
    EXAMPLE I
    A young, college coed visits a campus health center for her routine annual gynecological exam, complaining of vaginal irritation. Upon examination of the vagina, the physician observes the presence of a foamy, yellowish-green discharge and chafing of the vagina, vulva, and perineum. Using a vaginal speculum, exudate is collected from the vaginal canal and a wet mount preparation is made promptly and analyzed microscopically. The presence of organisms, 5-20 m in length with a jerky-type motion confirms the presence of Trichomonas vaginalis. The patient is treated by a method of the present invention. A composition containing bismuth subsalicylate is administered in a liquid douche delivering approximately 2500 mg of bismuth per liter of douching solution, twice daily (a total of 5000 milligrams of bismuth daily) for twenty-one days. Atovaquone tablets (750 milligrams per tablet) are concurrently administered three times a day for 21 days, delivering a total of 2250 milligrams of atovaquone per day. Thereafter, vaginal samples from the patient are analyzed again, finding no trace of parasitic infection. The subject remains asymptomatic, and another vaginal analysis performed 5 months later is normal.
    In the above example, tripotassium dicitrato bismuthate, bismuth tartrate, bismuth citrate, and bismuth subgallate, bismuth subnitrate may be substituted, respectively, for bismuth subsalicylate, with substantially similar results. Similarly, penicillin erythromycin, metronidazole, doxycycline, tinidazole, amoxicillin, ampicillin, nitrofurantoin, chloroquine phosphate, quinacrine hydrochloride, iodoquinol, pyrimethamine, and mefloquine hydrochloride may be substituted for atovaquone with substantially similar results.
    EXAMPLE II
    A male AIDS patient, who recently recovered from cryptosporidal diarrhea, reports symptoms of genital irritation to his primary healthcare provider. Upon examination of the patient's penis, a small, purulent lesion is observed one centimeter from the urethral opening. A thin smear of the exudate is prepared and stained for 90 minutes with Modified Trichome-Blue Stain before oil immersion examination, while a midstream urine sample is collected, centrifuged, and examined promptly via light microscopy. The results show no indication of urinary infection; however, the presence of spores with coiled polar tubules confirms an infection with Encephalitozoon hellem. The infection is treated by cleansing the lesion gently with non-medicated soap and topically applying a small amount of an ointment consisting of 10% bismuth subcitrate, 0.75% metronidazole, and 0.1% iodoquinol twice daily over the lesion for about 28 days, until the lesion has healed completely. Thereafter, visual inspection of the penis is performed, finding slight scarring but no trace of parasitic infection.
    In the above example, bismuth citrate, bismuth tartrate, bismuth aluminate, bismuth subgallate, and bismuth subsalicylate are substituted, respectively, for bismuth subcitrate, with substantially similar results. Similarly, penicillin, erythromycin, doxycycline, tinidazole, amoxicillin, ampicillin, nitrofurantoin, and atovaquone are substituted, respectively, for metronidazole or iodoquinol, with substantially similar results. In addition, either antibiotic can be eliminated from the regimen (e.g. due to hypersensitivity) and maintain therapeutic efficacy.
    EXAMPLE III
    A young man, in the presence of his physician, confides to his future bride two days before their marriage that he is being treated for a urethral infection caused by Trichomonas vaginalis, reportedly from using a contaminated towel at his gym. The physician advises the groom to continue his current therapy until eradication of the parasite is complete. Clinical analyses indicate that the bride currently is not infected. Since the use of condoms is not considered due to religious beliefs, the bride is given 3500 milligrams of bismuth, administered as bismuth subnitrite in a vaginal suppository, for use thirty minutes before sexual intercourse. Following intercourse, a douche is administered delivering 500 milligrams of furolzolidone in one liter of douching solution. The suppository and douching regimen are used for about 30 days or until her husband is determined to be free of infection. At this time, vaginal samples are taken from the wife and analyzed and no evidence of parasitic infection is found.

    Claims (12)

    1. The use of from 50 to 5000 milligrams of bismuth, by weight of elemental bismuth, for the manufacture of a medicament for the treatment of a urogenital disorder caused, or mediated, by one or more parasitic protozoa said treatment comprising administering from 50 to 5000 milligrams of bismuth, by weight of elemental bismuth, per day for from 1 to 28 days and simultaneously administering from 100 to 10000 milligrams of each of one or more further antimicrobials per day for from 1 to 28 days.
    2. The use according to Claim 1 wherein the bismuth is administered independently from the one or more further antimicrobials.
    3. The use according to Claim 1 wherein the bismuth is administered in a single composition with the one or more further antimicrobials.
    4. The use according to any of Claims 1 to 3 wherein the bismuth is administered intravaginally in the form of a suppository at a level of from about 50 milligrams to about 2500 milligrams, per day.
    5. The use according to any of Claims 1 to 4 wherein the bismuth is selected from the group consisting of bismuth aluminate, bismuth subcarbonate, bismuth subcitrate, bismuth citrate, tripotassium dicitrato bismuthate, bismuth subgalate, bismuth subsalicylate, bismuth tartrate, and mixtures thereof.
    6. The use according to any of Claims 1-5 wherein each of the one or more antimicrobials is administered orally at a level of from about 100 milligrams to about 8000 milligrams, per day.
    7. The use according to any of Claims 1-6 wherein the one or more antimicrobials are selected from the group consisting of penicillin, tetracycline, metronidazole, doxycycline, tinidazole, amoxycillin, ampicillin, nitrofurantoin, and atovaquone.
    8. The use according to any of Claims 1-7 wherein the bismuth is administered intravaginally in the form of a douche for from 2 to 28 days and the one or more antimicrobials are administered in the form of a tablet for from 1 to about 21 days.
    9. The use according to any of Claims 1-8 wherein the parasitic protozoa are selected from the group consisting of Trichomonas vaginalis, Encephalitozoon hellem, and combinations thereof.
    10. The use according to any of Claims 1 to 9 to prevent a urogenital disorder caused, or mediated, by one or more parasitic protozoa said prevention comprising administering from 50 to 5000 milligrams of bismuth, by weight of elemental bismuth, per day for from 1 to 14 days and simultaneously administering from 100 to 10000 milligrams of each of one or more further antimicrobials per day for from 1 to 14 days.
    11. The use according to Claim 10 wherein the bismuth is administered intravaginally for from about 1 to 14 days and the one or more antimicrobials are administered for from 1 to 7-10 days.
    12. The use according to any of Claims 1-10 wherein the parasitic protozoa are selected from the group consisting of Trichomonas vaginalis, Encephalitozoon hellem, and combinations thereof.
    EP96308851A 1995-12-07 1996-12-05 Compositions for the prevention and treatment of urogenital disorders, containing bismuth and one or more antimicrobials Expired - Lifetime EP0778028B1 (en)

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